<template>
  <view class="search-box">
    <uni-search-bar 
      class="search-bar"
      @input="input" 
      :radius="100"
      cancelButton="none"
    ></uni-search-bar>
    <!-- 搜索建议列表 -->
    <view class="sugg-list" v-if="searchReasults.length !== 0">
      <view class="sugg-item" v-for="(item, index) in searchReasults" :key="index" @click="gotoDetail(item)">
        <view class="goods-name">{{item.goods_name}}</view>
        <uni-icons type="arrowright" size="16"></uni-icons>
      </view>
    </view>
    <!-- 搜索历史 -->
    <view class="history-box" v-else>
      <view class="history-title">
        <text>搜索历史</text>
        <uni-icons type="trash" size="17" @click="clean"></uni-icons>
      </view>
      <!-- 历史搜索列表 -->
      <view class="history-list">
        <uni-tag :text="item" v-for="(item, index) in histories" :key="index" @click="gotoGoodsList(item)"></uni-tag>
      </view>
    </view>
  </view>  
</template>

<script>
  export default {
    data() {
      return {
        timer:null,
        kew:'',
        searchReasults:[],
        historyList:[],
      };
    },
    onLoad() {
      this.historyList =JSON.parse(uni.getStorageSync('kw') || '[]')
      // console.log(this.historyList)
    },
    methods:{
      input(e){ //输入事件处理函数
        clearTimeout(this.timer)
        this.timer = setTimeout(() =>{
          // console.log(e.value)
          this.kw = e
          this.getSearchList()
        },500)
      },
      async getSearchList(){
        if(this.kw.length === 0){
          this.searchReasults = []
          return
        }
       const {data:res} = await uni.$http.get('/api/public/v1/goods/qsearch',{query:this.kw})
       if(res.meta.status !== 200) return uni.$showMsg() 
       this.searchReasults = res.message
       this.saveSearchHistory()
      },
      gotoDetail(item){
        uni.navigateTo({
          url:'/subpkg/goods_detail/goods_detail?goods_id=' + item.goods_id
        })
      },
      saveSearchHistory(){
        // this.historyList.push(this.kw)
        const set = new Set(this.historyList)
        set.delete(this.kw)
        set.add(this.kw)
        this.historyList = Array.from(set)
        // 存储
        uni.setStorageSync('kw',JSON.stringify(this.historyList))

      },
      clean(){
        this.historyList = []
        uni.setStorageSync('kw','[]')
      },
      gotoGoodsList(kw){
        uni.navigateTo({
          url:'/subpkg/goods_list/goods_list?query=' +kw
        })
      }
    },
    computed:{
      histories(){
        return [...this.historyList].reverse()
      }
    }
   
  }
</script>

<style lang="scss">
.search-box{
  position: sticky;
  top: 0;
  z-index: 999;
}
.sugg-list{
  padding: 0 5px;
  .sugg-item{
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 14px;
    padding: 13px 0;
    border-bottom: 1px solid #efefef;
    .goods-name{
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
  }
}

// 搜索历史区域
.history-box{
  padding: 5px;
  .history-title{
    display: flex;
    justify-content: space-between;
    height: 40px;
    align-items: center;
    font-size: 14px;
    border-bottom: 1px solid #efefef;
  }
  .history-list{
    display: flex;
    flex-wrap: wrap;
    margin: 5px 10px;
    .uni-tag{
      margin-left: 10px;
    }
  }
}
</style>
